The post is tagged non-fiction, but it ignores the option to "Complete your Disabilty Update Report Online (https://www.ssa.gov/ssi/text-cdrs-ussi.htm), which I found after following the link in the first sentence.
The form is an embedded iFrame from "Adobe Acrobat Sign", supposedly pure Javascript . It would be a bigger story if this form were not accessible to the disabled.
The form includes a place to attach two PDF, text, or image formats. "Attachments are limited to 5MB and 25 pages".